Question

2
if the molecule has two or more configurations or orientations which are super
impossible to each other than such type of molecule are said to be

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Answer 1

Explanation:

Chirality

In the previous chapter we defined stereoisomers as molecules that have the same connectivity but differ in their spatial arrangement of atoms. We saw that the rigidity of double bonds gave rise to one type of stereoisomerism, cis-trans isomerism. However, it turns out, cis-trans isomers form only a small subset of stereoisomers. A more important type of stereoisomerism arises from molecules that are chiral.

You already have some intuitive notion of what it means for an object to be chiral, which is a Greek word meaning "handed". Consider the relation between your left and right hands. They appear to be the same, and yet there are clearly some ways in which they are distinct. For example, a right glove that fits easily over your right hand will not fit over your left hand. You would have a hard time fitting a left shoe over your right foot. A pair of right-handed scissors works fine in your right hand but feels awkward when you try to use your left hand.

What does it mean for an object to be chiral? To answer this question, again consider your left and right hands. The objects look identical; in fact theyare mirror images of each other. However, they are not the same. The test used to determine whether two objects are identical is superimposability. That is, can two objects be placed in the same space in such a way that all of their components overlap? Try the test of superimposability on your left and right hands, and you should see that they are not superimposable. This allows us to define what it means for an object to be chiral: